2010年の夏期高温条件下における高温耐性水稲品種「元気つくし」 の玄米品質

日本作物学会紀事

坪根 正雄¹  小田原 孝治²  大野 礼成²  宮崎 真行¹  浜地 勇次² 

[1] 福岡県農業総合試験場農産部;福岡県農業総合試験場筑後分場

关键词: Breeding;    育種;    Heat-tolerance;    高温耐性;    High air temperature;    Kernel quality;    玄米品質;    Rice cultivar;    水稲品種;    White immature kernel;    白未熟粒;   

DOI  :  10.1626/jcs.81.332

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

High air temperatures during the summer of 2010 damaged the apparent quality of rice kernels in a large area of Japan. When the average temperature during the 20 days after heading was 28°C or higher, the percentage of first-grade rice kernels according to inspection grade in Fukuoka prefecture was higher than 90% in the heat-tolerant cultivar ‘Genkitsukushi’. Furthermore, in the fields with different soil fertility and with different crops cultivated in the previous summer, the incidence of white immature kernels was significantly lower and the rice kernel quality was superior in ‘Genkitsukushi’ than in cultivars with less heat-tolerance. In addition, the proportion of white immature kernels in ‘Genkitsukushi’ at any position within the panicle were lower than those in the heat-sensitive rice cultivar ‘Tsukushiroman’, which has a similar panicle architecture, at comparable average temperatures during the 20 days after heading. These results suggest that the tolerance of ‘Genkitsukushi’ to high air temperatures was stably excellent, and that it was not related to panicle architecture, but to some unidentified physiological factor.

【 授权许可】

Unknown